Kettle base



FIG. 1 is a side perspective view of a design of the kettle base;

FIG. 2 is a first side elevation view of the kettle base of FIG. 1;

FIG. 3 is a second side elevation view of the kettle base of FIG. 1;

FIG. 4 is a front elevation view of the kettle base of FIG. 1,

FIG. 5 is a rear elevation view of the kettle base of FIG. 1;

FIG. 6 is a top plan view of the kettle base of FIG. 1; and,

FIG. 7 is a bottom plan view of the kettle base of FIG. 1.

The features shown in broken lines depict environmental subject matter only and form no part of the claimed design. 

CLAIM We claim the ornamental design for a kettle base, as shown and described. 